在现场基因组测序解决完整的生物样本中的DNA序列和结构
Andrew C Payne1,2, Zachary D Chiang2,3, Paul L Reginato1,2,4,5,6
1Media Arts and Sciences, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.
概括
在现场基因组测序 (IGS) 允许在细胞内同时进行DNA测序和成像. 这种新方法揭示了人类和小鼠胚胎的基因组结构和表观遗传记忆.
科学领域:
- 基因组学
- 分子生物学
- 表观遗传学
背景情况:
- 了解基因组组织需要将DNA序列与3D空间背景整合起来.
- 目前的全基因组方法通常缺乏基因对分辨率或直接的空间定位.
研究的目的:
- 实地基因组测序 (IGS) 是一种用于完整的生物样本中同时测序和成像的新方法.
- 证明IGS在表征基因组结构和表观遗传修饰方面的能力.
主要方法:
- 开发并应用现场基因组测序 (IGS) 对人类纤维细胞和早期小鼠胚胎.
- 在个体核中空间定位成千上万个基因组位置.
- 集成的DNA序列数据与3D空间信息.
主要成果:
- 胚胎发育期间基因组结构的特征性变化.
- 揭示了单细胞染色体的域.
- 在个体胚胎中发现全染色体定位的表观遗传记忆.
结论:
- IGS通过各种长度尺度直接连接DNA序列和基因组结构.
- 这种方法为单个细胞中的基因组组织和表观遗传调节提供了前所未有的洞察力.
- IGS在发育生物学和理解基因组功能方面具有广泛的应用.
相关概念视频
Genomics
38.9K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
38.9K
Sanger Sequencing
767.6K
DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
767.6K
In-situ Hybridization
10.1K
In situ hybridization (ISH) is a technique used to detect and localize specific DNA or RNA molecules in cells, tissue, or tissue sections using a labeled probe. The technique was first used in 1969 for the investigation of nucleic acids. It is currently an essential tool in scientific research and clinical settings, especially for diagnostic purposes.
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
10.1K
Genome Annotation and Assembly
19.9K
The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
19.9K
Next-generation Sequencing
96.0K
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
96.0K
RNA-seq
11.1K
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
11.1K


